High Optical Response of Niobium-Doped WSe(2)-Layered Crystals

The optical properties of WSe(2)-layered crystals doped with 0.5% niobium (Nb) grown by the chemical vapor transport method were characterized by piezoreflectance (PzR), photoconductivity (PC) spectroscopy, frequency-dependent photocurrent, and time-resolved photoresponse. With the incorporation of...

Descripción completa

Detalles Bibliográficos
Autores principales: Hsu, Hung-Pin, Lin, Der-Yuh, Jheng, Jhin-Jhong, Lin, Pin-Cheng, Ko, Tsung-Shine
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2019
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6479778/
https://www.ncbi.nlm.nih.gov/pubmed/30974754
http://dx.doi.org/10.3390/ma12071161
Descripción
Sumario:The optical properties of WSe(2)-layered crystals doped with 0.5% niobium (Nb) grown by the chemical vapor transport method were characterized by piezoreflectance (PzR), photoconductivity (PC) spectroscopy, frequency-dependent photocurrent, and time-resolved photoresponse. With the incorporation of 0.5% Nb, the WSe(2) crystal showed slight blue shifts in the near band edge excitonic transitions and exhibited strongly enhanced photoresponsivity. Frequency-dependent photocurrent and time-resolved photoresponse were measured to explore the kinetic decay processes of carriers. Our results show the potential application of layered crystals for photodetection devices based on Nb-doped WSe(2)-layered crystals.

Ejemplares similares